| Molecular Formula | C4H6 |
| Molar Mass | 54.09 |
| Density | 0.80 g/mL at 20 °C(lit.) |
| Melting Point | -138.7 °C |
| Boling Point | 9-12 °C |
| Risk Codes | R12 - Extremely Flammable R22 - Harmful if swallowed |
| UN IDs | UN 2037 2.1 |
| storage conditions | −20°C |
| WGK Germany | 3 |
| HazardClass | 2.1 |